4-METHYL-1,3-PENTADIENE Property

Melting point:

-94.9°C (estimate)

Boiling point:

75-77 °C

Density 

0.718 g/mL at 20 °C(lit.)

refractive index 

n20/D 1.452

Flash point:

-18 °C

storage temp. 

2-8°C

Dielectric constant

2.6000000000000001

EPA Substance Registry System

1,3-Pentadiene, 4-methyl- (926-56-7)

Safety

Hazard Codes 

F,Xn

Risk Statements 

11-65

Safety Statements 

16-36-62

RIDADR 

UN 2461 3/PG 2

WGK Germany 

3

HazardClass 

3.1

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

H304May be fatal if swallowed and enters airways

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P240Ground/bond container and receiving equipment.

P241Use explosion-proof electrical/ventilating/lighting/…/equipment.

P242Use only non-sparking tools.

P243Take precautionary measures against static discharge.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P370+P378In case of fire: Use … for extinction.

P403+P235Store in a well-ventilated place. Keep cool.

P501Dispose of contents/container to..…

4-METHYL-1,3-PENTADIENE Chemical Properties,Usage,Production

General Description

A clear colorless liquid with a petroleum-like odor. Flash point -30°F. Less dense than water and insoluble in water. Vapors heavier than air.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

4-METHYL-1,3-PENTADIENE may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions. May undergo autoxidation upon exposure to the air to form explosive peroxides. Violent explosions at low temperatures in ammonia synthesis units have been traced to the addition products of dienes and nitrogen dioxide [Bretherick, 5th Ed., 1995].

Health Hazard

Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.